Predetermined counter



Dec. 25, 1962 A. ARNELL ETAL 3,070,298

PREDETERMINED COUNTER Filed Feb. 12,- 1958 3 Sheets-Sheet 1 FIG!INVENTORS ALVIN ARNELL HOWARD BERGER A TTORNEYS Dec. 25, 1962 A. ARNELLETAL 3,070,298

PREDETERMINED COUNTER Filed Feb. 12, 1958 s Sheets-Sheet :5

FIG.4

INVENTORS ALVIN ARNELL HOWARD BERGER ATTORNEYS Alvin Arnell and Howardfierger, Brooiri n, N.ll., assign- This invention relates to anelectromechanical counter apparatus and more particularly to a countercircuit for continuously counting successive alternate series ofpredetermined counts and for counting to 1000 with a basic three decadeor digit device.

in various industrial applications it is desirable to count successiveoperations, for example, the number of sheets of paper being printed orotherwise processed, the number of rotations of a shaft, the number oftimes a valve is opened or closed, and so forth, and when a preselectedcount is reached to provide some sort of indication thereof, by, forexample, an indicator light or the actuation of some other piece ofequipment. it is also frequently desirable to count some of the abovetype operations in succession to alternate predetermined counts and tohave one of the aforementioned indications at the end of each successivepredetermined count.

It is an object of the present invention to provide an electromechanicalcounter having a normal three digit circuit which can be used to providea four digit prede termined count.

Another object is to provide such a counter which counts two alternatesequences of predetermined counts continuously and resets automaticallyin between each successive count.

An additional object is to provide a counter of the above type in whichthe counter circuits for the respective digits all are resetindependently of one another, or simultaneously, thereby increasing thespeed of operation of the device.

Briefly, the present invention involves an electromechanical counter forcontinuously counting successive alternate series of predeterminedcounts, one being higher than the other, which comprises threeelectrically interconnected single-motion rotary stepping switches eachrepresenting a different decimal digit, i.e. units, tens and hundreds. Afirst and a second bank of selector switches are connected to thestepping switches for selecting the respective digits of the alternateseries of predetermined counts. Input means is provided on the counterfor receiving sequential impulses and delivering them to the units digitstepping switch.

A first relay is provided and is operable in response to eachpredetermined count being reached. A second and a third relay arecoupled with the first relay and are operable thereby, the closure ofthe second relay providing an output signal representative of the higherof the two predetermined counts, and a fourth relay is operativelyinterconnected with the second bank of selector switches upon closure ofthe third relay and operates a fifth relay in response to the other ofthe aforesaid pre determined counts being reached to provide an outputsignal therefor.

Resetting means is operated by the first relay to simultaneously resetall the stepping switches to a zero or home position after eachpredetermined count is reached.

A sixth relay is interconnectable with the first relay and the steppingswitches, and is actuated by the stepping switches rcaching apredetermined count of 999, at which point the first relay is actuatedby the next succeeding impuse to close the second relay and indicate1690.

Switching means is provided in the circuit and connected to the firstbank of selector switches. The switchrrired States l tent ing means hasa first position at which the first bank of selector switchesinterconnected with the first relay, and a second positon at which thesixth relay is interposed between the first bank of selector switchesand the first relay. The counter successively indicates 1000continuously with the switching means in the first position and thefirst bank of selector switches set to 999, and indicates successivealternate series with the switching means in its second position, thefirst predetermined number being 999 and the second a number less than999, or whatever other successive alternate series might be selected bythe setting of the first and second banks of selector switches.

Other objects and features of the invention will appear in the followingspecification and appended claims, and in the drawings, in which:

KG. 1 is a front elevation of one type of rotary stepping switch usedwith the present invention;

PEG. 2 is a side elevation of the device shown in FIG. 1;

FIG. 3 is a schematic diagram of the input circuit, and the units andtens digit stepping switches; and

PEG. 4 is a schematic diagram of the hundreds digit stepping switch anassociated circuitry.

Referring now to the drawings, FlGS. 1 and 2 show a three-level rotarystepping switch as used for each digit counter circuit in the presentinvention, and the mechanism is generally designated by the referencenumeral 14 The switch lid is a single-motion switch which transmitsrotary motion to the wiper assembly llll and uses this rotary motion forselection and to restore the wiper assembly 11 to a normal or homeposition. The wiper assembly shown is of the 11 point type having foreach bank level 12 three pairs of wipers l3 angularly spaced from oneanother, so that as one pair is leaving the set of bank contacts 14 atthe upper end 15 as shown in FIG. 2, the other pair is moving intowiping engagement with the set of bank contacts 14 at the lower or 1 end16. The switch rotates the wiper assemblies 11 step-bystep in onedirection only causing the wipers 13 to rest on each bank contact orterminal 14 in succession.

As shown in the drawings the rotary stepping switch it) has eleventerminals 14 in each bank level 12, and three or more bank levels 12..The utilization of these bank levels 12 will be explained in greaterdetail herein after.

The stepping switch lit? is of the indirect drive type, i.e. the wipersl3 are advanced during the release of the armature 17 rather than duringthe actuation thereof. When the driving magnet coil 18 is energized bythe reception of an electrical pulse, or when the coil is otherwiseconnected to a power source (not shown), it attracts the armature 17upwardly as viewed in H6. 2, and such upward movement of the armaturecompresses driving spring 19, moves the pawl 29 into engagement with thenext ratchet tooth 21 and operates the interrupter contact springs 22which opens the electrical circuit to the driving magnet coil and causesthe armature 17 to be released. T upward movement of the armature 17during energization of the coil 18 also disengages the stopping teethfrom engagement with its adjacent ratchet tooth 2 on the ratchet wheel25. The wiper assembly 11 is held in place during operation of thearmature 17 by a detent spring 26 which engages the ratchet tooth 27.When the coil 13 de-energizes by the movement of the interrupter contactsprings 22 previously mentioned, the driving spring 19 expands, rotatingthe wiper assembly, via the pawl 20, one step in a counterclockwisedirection as viewed in FIG. 2, to the next bank contact 14. At the endof the driving stroke, armature stopping teeth 23 mesh with the teeth 28of the ratchet wheel 25. This automatically positions the wipers 13 1-by connection to their radially outward terminal ends 29, and the otherconnections are made in the wellknown fashion and as shown in FIGS. 3and 4.

In the switch shown, the Wiper assembly ill for the first and secondbank levels 3%, 31 are of the so called non-bridging type, i.e. thewiper 13 leaves one bank contact 1d before engaging the next. The wiperassembly 11 for the third bank level 32 is of the bridging type whichduring rotation, before breaking away from one bank contact 14, alsoengages the next bank contact lid for use in homing in the conventionalmanner.

Three of t. e above type stepping switches are electricallyinterconnected as shown in FIGS. 3 and 4 to provide a units decade 33, atens decade 3d and a hundreds decade 35, and having an input circuit asand an output circuit 37.

The input circuit 36 is comprised of an impulse generating switch of anysuitable conventional type which is actuated in response to theindividual equipment with which the invention is to he used to providethe electrical counting impulses for the counting circuit designatedgenerally by the reference numeral 39. Closure of switch 33 connectspositive electricity to the coil 40 of relay 41, closing relay contacts42, 43, and 45. Such closure therefore occurs each time switch 33 isclosed. The closure of contact 45 ignites indicator lamp 46 to providevisual confirmation of the generation and reception of a counting pulseby the input circuit 36.

The units, tens and hundreds decades 33, 34 and 35 have a first bank ofselector switches 47, E8 and 49 respectively, and a second bank ofselector switches (ill, 51 and 52 respectively, each of the first bankof selector switches having adjustable indicators 53 which may bemanually preset for the particular digits in each decade for the firstpredetermined count, and each of the second bank of selector switcheshaving similar manually adjusta le indicators for selecting the digitsof the second and alternate predetermined count. The stationary contacts55 of the selector switches are wired to corresponding stationarycontacts 56 on the stepping switches 10 in the decades 33, 34 and 35 asshown to apply positive voltage through the interconnected contacts 55,56 when the wiper &3, which is connected to the positive voltage,engages the respective contacts 56.

The counting circuit 39 ordinarily may be employed to countcontinuously, and in alternate fashion, two predetermined counts, thefirst being 999 or less, and the second being at least one number lessthan the first. The first predetermined count is determined by thesetting of the adjustable indicators on the first bank of selectorswitches 47, 4d and 59, and the second predetermined count is determinedby the setting of the adjustable indicaters 54 on the second bank ofselector switches 5t 51 and 52. For normal operation to provide thepredetermined counts just described, switch 57, any conventional singlepole double throw switch, is placed in its position shown in HG. 4,closing contact 58.

At the start of the counting operation for the first of the alternatepredetermined counts, the impulse generating sw' ch 38- closes for eachcounting pulse and actuates i as previously mentioned. Positive voltageis relay l delivered to the wipers 13 of the first and second banklevels 313 31 of the units decade stepping switch 33, and inElddtllOl'l, through contact of relay 41, connects positive voltage tothe driving magnet coil 59 for the units decade as described above andupon release of the magnet coil i.e. its tie-energizing by opening ofrelay contact d2, the units decade stepping switch it} is rotated onestep indicating a count of one, being thereby moved from its homeposition as shown in FIG. 3 to the No. l stationary conta t in each banklevel 12. This likewise rotates earn 61 clockwise from the positionshown FIG. 3 thereby permitting arm 62 to move downwardly viewed in FIG.3, thereby opening contact 63 and closing contacts 6d and 65 whichprovide necessary ccnnecti for the subsequent resetting operation whichwill be described in greater detail hereinafter.

When nine impulses have been received in the above ianncr by the unitsdecade, the wipers 13 in each level 2 thereof are positioned against No.9 stationary contacts Since, as previously explained, the wiper is notuntil after the pulse has been received, the recept connects positivevoltage through -.l through wiper i3 and No. 9 stathe first bank level36* of units eating a carry operation and registering a it by movingwipers 13 of the respectact se.

The tenth pulse also causes the units decade switch to move to the No.ll) stationary contact 68, and by virtue of the bridging third banklevel 32 as shown causes the switch to advance to its home positionagainst No. 11 stationary contact as in preparation for reception of thenext impulse.

Similarly, when t e tens decade 34 nine, is. the wipers 13 in each levelb with No. 9 stationary contacts uereor, then upon receiving the tenthoulse energ voltage is elivered through the wipers of the second banklevel 31 of the units and tens decade 33, 34-, for the driving magnetcoil 7 in the hundreds decade In this invention the impulses arereceived at the input circuit 36 and successively counted by the units,tens and hundreds decades 33, 3d and 35 until the hundreds decade wipers13 stand against the stationary contacts corresponding to thepredetermined count indicated by the hundreds adjustable indicator 53,and the tens and units decades have correspondingly reached theirpredetermined positions, so that positive voltage is connected throughall of the first bank of selector switches 47, 48 and 4-9 to switch 57and through contact 58 thereof to relay 71, thereby energizing thelatter relay, opening its associated contact '72 and closing contacts73, 7 '75 and 76 thereof. Closure of contact 73 supplies positiveenergi" voltage to output relay 77, the closure of contact T'o ofproviding positive voltage at the output circuit '7 further utilization.

Simultaneously with the actuation of relay 7i, closure of contact '73thereof also energizes relay 79, and close contacts 84) and of thelatter, thereby connecting the second bank of selector switches 5'9, andthrough contac 81 to the coil 32 of relay 83 and providing lockinvoltage for relay 79 through contact normally closed contact of relayThe closure of contacts 74, and 6 of relay '71 supply positive voltageto the units, tens and hundreds decades 33. and 35 for simultaneousresetting thereof to their respective home positions, the res. i ationto be described below.

Assuming fo the moment that the resetting has been accomplished, thesucceeding impulses are received in similar fashion as previc-u ydescribed until the second predetermined count, as ir' ated by theposition of the second bank of selector swr. .res and 52, is reached,hrough all of ed contact 81 c zes a setting or" e ng in engagement thelatter selector swit of relay 7% to energ and close contact 2 55 thereofto e ize in t: el

provide positive voltage through closed contact 8*? of the latter forfurther utilization at the output circuit gizing of relay S3simultaneously opens contact 34- and removes lock in vol "e from r l' y7'3", thereby returning relays '79, 83 and to their normal (le-cnc izcdcondition.

in lieu of the second bank 1 n selector switches, it lo possible toprovide a fixed second predetermined count of a number less t..an nineby making the dotted connection shown in F165. 3 and 4 whereby, forexample, the No. 4 stationary contact of the second bank level 31 of theunits decade is connected to contact 81 of relay 79, in which case uponreaching the fourth pulse of the second count, an output pulse issimilarly provided through relay 86 in the output circuit 37.

One of the unique features of the invention is that a count of 1060 canbe made utilizing only three decades, and that is accomplished asfollows. Switch 57 is turned so that its other contact 38 is closed andthe first bank of selector switches 57, 43 and 49 is set for apredetermined count of 999, i.e. its adjustable indicators 53 are movedto engagement with the N0. 9 stationary contacts 55. After the 999thpulse has been received the wipers 13 of the second bank levels 31 ofall decades close a circuit from contact 44 of relay 41 through normallyclosed contact d9 of relay 9% to the coil 91 of relay 92. Upon receptionof the 1000th pulse, positive voltage is delivered through closedcontact 44, through the circuit just described, energizing relay 92 anddelivering positive voltage through the first bank of selector switches47, 43 and 49, through closed contact 94 of relay 92 to energize relay71 and cause an output pulse to be delivered by relay 77 in the mannerpreviously described. Closure of other contacts 93 of relay 92 provideslock-in voltage for relay 92 from the reception of the 999th pulse anduntil reception of the lOOGth pulse, such lock-in voltage being removedby energization of relay 71 when the IOOOth pulse is received.

With switch 57 closing contact 88 in the above manner, the countercircuit 39 counts to 1000 each time and an output signal is providedonly at output relay 77. With switch 57 set against contact 53, thecounting circuit 3% provides an output pulse at relay '77 for a firstpredetermined count if 999, and a second predetermined count of thelesser number pr selected by the second bank of selector switches 5h, 51and 52 with a corresponding output pulse at relay as, and continuousalternate counts of 999 and the lesser number are thereby provided.

Positive DC. voltage may be supplied to the above circuit by anyconventional means such as a full-wave rectifier connected to the outputof a step-down transformer connected through its primary to aconventional 110 or 220 volt A.C. supply.

Resetting is accomplished upon reaching each predetermined count by theenergizing of relay '71 as mentioned above. Closure of contacts 74, '75and 76 of relay 71 energizes respective relays )9, Q5 and 96 in thehundreds, tens and units decades 3 5, 34 and 33, relay 96 only beingenergized when the off-normal cam 61 is in the ofif-normal or other thanthe home position as shown in FIG. 3.

Although resetting in each decade is accomplished simultaneously withthe other decades, we will, for con venience, first consider the hundreddecade circuit 35. Since resetting is only necessary when the circuit isat a position other than zero or home, the off-normal contacts 97 aretherefore, closed by the contacts 98 and 99.

The closure of contacts 99, together with the closed contacts 1% ofrelay 9% maintain relay 9 energized throughout the resetting operation.Closed contacts 93 of off-normal contacts 97 apply positive voltage todriving magnet coil 7% through interrupter contact spring 712 to causethe advancement of the hundreds decade wipers 13 to the home position asshown in FIG. 4 in the wellknown fashion.

Normally closed contact 89 of relay 9% is interposed between No. 9stationary contact 66 of the second bank level 31 of the hundreds decade35, and relay $2, in order to prevent relay 2 being energized when thewiper 13 associated with the latter No. 9 stationary contact 65 passessuch contact during the resetting operation.

It should be noted that respective contacts 103, 104 and 101 of relays96, 95 and 90 respectively, lock such relays to the positive source ofvoltage throughout the resetting operation. This is necessary by virtueof the fact that as soon as the hundreds decade 35 is reset to its homeposition, relay 71 is de-energized, which thereby disconnects relay 71from its source of positive voltage.

Switches 165, 166 and 107 are manual reset switches which can be usedwhen it is desired to manually reset any of the decades 33, 34 and 35individually for any reason.

Relay 108 is utilized in connection with the units decade to remedy anoperational difiiculty otherwise encountered when, for example, thetenth and eleventh pulse is being received at the input 36. Whereas thetens and hundreds decades each have a substantial period of time forresetting, the units decade must be reset instantaneously in order tocount subsequent pulses after any tenth pulse is received. In practiceit was found that the tendency was for the units decade 33 to overshootand thereby erroneously indicate higher numbers for the pulses actuallyreceived. Therefore, relay 168 is energized by the closure of contact 63associated with ofi-normal cam 61, which in turn interconnects with thepositive voltage through bridging wiper 13 of the third bank level 32 inthe units decade circuit 33 and No. 10 stationary contact 63 thereof toopen contact MP9 of relay 10S, and thereby disable driving magnet coil5% as soon as the home position is reached by oil-normal cam 61 of theunits decade 33. Otherwise, there is the possibility that interruptercontact spring 22 would deliver an extra pulse to the driving magnetcoil 59 at the home position.

Upon any of the decades reaching their home positions, their associatedcircuitry is returned to the condition as shown in FIGS. 3 and 4, andthe counting circuit 39 is then ready for the indication of the nextpredetermined count, whichever it might be.

Resistors 110 and condensers 111, connected to the respective drivingmagnet coils 59, 67 and 7t? serve as spark suppression circuits toprotect interrupter contact springs 22 in the decades 33, 34 and 35.

An additional relay (not shown) may be inserted in the circuit betweenrelay 71 and relay 77 to isolate the latter relays from one another, ifso desired.

The above circuit can be assembled in a very compact portable unit ofrelatively inexpensive parts and it should be apparent that it can havea wide variety of uses. It is relatively fool-proof in operation and canbe easily assembled in association with various types of industrialequipment, such as the printing press heretofore mentioned, to providethe desired predetermined count indications.

While one embodiment of the invention has been shown and describedabove, it is to be understood that certain changes and additions can bemade by those skilled in the art without departing from the scope andspirit of this invention.

We claim:

1. An electromechanical counter comprising a plurality of rotarystepping switches, means interconnecting said switches in cascade forcounting first and second alternate series of predetermined counts ofimpulses, a first and a second bank of selector switches on saidstepping switches adjustable for selecting said first and secondalternate series of predetermined counts, the selector switches on saidsecond bank, predetermining the count of said second series, beingadjustable only for a number lower than that set on said first bank, afirst relay coupled to said first bank and operable in response to thefirst of said predetermined counts to produce an output signal, andrelay means operably coupled to said first relay and operably coupled tosaid second bank upon closure of said first relay and operable inresponse to the second of said predetermined counts to produce an outputsignal.

2. An electromechanical counter for continuously counting successivealternate series of predetermined counts comprising a plurality ofrotary stepping switches each representative or a different digit, meanselectrically interconnecting said stepping switches in cascade selectorswitches connected to said stepping switches for selecting therespective digits of one of said alternate predetermined counts, inputmeans on said counter for receiving sequential impulses and energizingthe units digit stepping switch in response thereto, a first relaycoupled to said stepping switches and operable in response to eachpredetermined count, a second and a third relay coupied with said firstrelay and operable thereby, the closure of said second relay providingan output signal representative of one of said predetermined counts, afourth relay operatively coupled with said stepping switch s uponclosure of said third relay, and a fifth relay coupled with said fourthrelay and operable in response to actuation of said fourth relay by theother of said predetermined counts being of a number less than nine,thereby providing an output signal representative of the latter,resetting means coupled with said stepping switches and operable by saidfirst relay to reset said stepping switches to a zero position aftereach predetermined count is reached, a sixth relay interconnectable withsaid first relay and said stepping switches and operable by the latterreaching a predetermined count of nines, said first relay beingactuatable by the next succeeding impulse to close said second relay andindicate a 1 in the next digit higher than the number of steppingswitches, switching means connected to said selector switches andmovable from a first position interconnecting said first relay to saidstepping switches and by-passing said sixth relay, to a second positioninterposing said sixth relay between said stepping switches and saidfirst relay, said counter successively indicating the aforementioned 1continuously with said switching means in said second position and saidfirst bank of selector switches set to nines, and indicating saidsuccessive alternate series with said switching means in said firstposition.

3. An electromechanical counter for continuously counting successivealternate series of predetermined counts, one being higher than theother, comprising a plurality of rotary stepping switches eachrepresentative of a different digit, means electrically interconnectingsaid stepping switches in cascade first and second banks of selectorswitches connected to said stepping switches for selecting therespective digits of said alternate predetermined counts, input means onsaid counter for receiving sequential impulses and energizing the unitsdigit stepping switch in response thereto, a first'relay ccupled to saidstepping switches and operable in response to each predetermined count,at second and a third relay coupled with said first relay and operablethereby, the closure of said second relay providing an output signalrepresentative of the higher of said predetermined counts, a fourthrelay operatively coupled with said second bank of selector switchesupon closure of said third relay, and a fifth relay coupled with saidfourth relay and operable in response to actuation of said fourth relayby the other of said predetermined counts, thereby providing an outputsignal representative of the latter, re setting means coupled with saidstepping switches and operable by said first relay to reset saidstepping switches to a zero position after each predetermined count isreached, a sixth relay interconnecta'ole with said first relay and saidstepping switches and operable by the latter reaching a predeterminedcount of nines, said first relay being actuatable by the next succeedingimpulse to close said second relay and indicate a l in the next digithigher than the number of stepping switches, switching means connectedto said first bank of selector switches and movable from a firstposition interconnecting said first relay to said first bank of selectorswitches and bypassing said sixth relay, to a second positioninterposing .9 0 said sixth relay between said first bank of selectorswitches and said first relay, said counter successively indicating theaforementioned 1 continuously with said switching means in said secondposition and said first bank of selector switches set to nines, andindicating said successive alternate series with said switching means insaid first position.

4. An electromechanical counter for continuously counting successivealternate series of predetermined counts, one being higher than theother, comprising three single-motion rotary stepping switches eachrepresentative of a dilierent decimal digit, means electricallyinterconnecting said stepping switches in cascade first and second banksof selector switches connected to said stepping switches for selectingthe respective digits of alternate predetermined counts, input means onsaid counter for receiving sequential impulses and energizing the unitsdigit stepping switch in response thereto, a first relay coupled to saidstepping switches and operable in response to each predetermined count,a second and a third relay coupled with said first relay and operablethereby, the closure of said second relay providing an output signalrepresentative of the higher of said predetermined counts, a fourthrelay opcratively coupled with said second bank of Selector switchesupon closure of said third relay, and a fifth relay coupled with saidfourth relay and operable in response to actuation of said fourth relayby the other of said predetermined counts, thereby providing an outputsignal representative of the latter, resetting means coupled with saidstepping switches and operable by said first relay to simultaneouslyreset said stepping switches to a zero position after each predeterminedcount is reached, a sixth relay interconnectable with said first relayand said stepping switches and operable by the latter reaching apredetermined count of nines, said first relay being actuatable by thenext succeeding impulse to close said second relay and indicate 1000,switching means connected to said first bank of selector switches andmovable from a first position interconnecting said first relay to saidfirst bank of selector switches and by-passing said sixth relay, to asecond position interposing said sixth relay between said first bank ofselector switches and said first relay, said counter successivelyindicating the aforementioned 1000 continuously with said switchingmeans in said seccnd position and said first bank of selector switchesset to nines, and indicating said successive alternate series with saidswitching means in said first position the first predetermined numberbeing 999 and the second less than 999.

5. An electromechanical counter for counting alternate series ofpredetermined counts of electrical pulses, cornprising a plurality ofstepping switches operable in response to said pulses, each of saidswitches having successive positions representing decimal numbers from 0to 9, means interconnecting said switches in cascade relation forcounting said alternate series of predetermined counts, a bank ofselector switches on said stepping switches adjustable for selecting oneof said predetermined counts, at fixed selector circuit connected to theunits digit stepping switch establishing the other of said predeterminedcounts at a number less than 9, a first relay coupled to said selectorswitches and rendered operable when all of said switches are at theirpositions representing nines, a second relay coupled to said first relayand operated by the next succeeding pulse after operation of said firstrelay, relay means coupled to said stepping switches and operable inresponse to the impulses representative of each of said predeterminedcounts for delivering electrical impulses external of said counter forfurther utilization, and resetting means operable by said relay meansfor resetting said stepping switches to Zero after each predeterminedcount.

6. An electromechanical counter for counting alternate series ofpredetermined counts of electrical pulses comprising three rotarystepping switches operable in response to said pulses, each of saidswitches having successive positions representing decimal numbers from Oto 9, means interconnecting said switches in cascade relation forcounting said alternate series of predetermined counts, a bank ofselector switches on said stepping switches adjustable for selecting oneof said predetermined counts, at fixed selector circuit connected to theunits digit stepping switch establishing the other of said predeterminedcounts at a number less than 9, a first relay coupled to said selectorswitches and rendered operable when all of said switches are at theirpositions representing nines, a second relay coupled to said first relayand operated by the one thousandth pulse, relay means coupled to saidstepping switches and operable in response to the impulsesrepresentative of each of said predetermined counts for deliveringelectrical impulses external of said counter for further utilization,and resetting means to reset all of said stepping switchessimultaneously to their zero positions after reception of saidsucceeding pulse.

References Cited in the file of this patent UNITED STATES PATENTS2,346,869 Poole Apr. 18, 1944 2,570,306 Battersby Oct. 9, 1951 2,574,283Potter Nov. 6, 1951 2,802,627 Crabtree Aug. 13, 1957 2,803,407 BergerAug. 20, 1957 2,827,237 Erickson Mar. 18, 1958 2,945,183 Hartke et a1.July 12, 1960

